JPS61200206A - Road joint - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a road joint, and is constructed at a joint of a road bridge such as a bridge or an elevated road.

(Prior art) As an example of a road joint, for example, JP-A-58-
As described in Publication No. 58307, a pavement consisting of an asphalt mixed base layer and an asphalt mixed surface layer, in which a movable gangplank is straddled in the bridge length direction between gaps at road joints, and reinforcing wire mesh is buried on the bridge plank. There are some that have. This conventional example attempts to absorb the expansion and contraction of the bridge by utilizing the asphalt mixed base layer sliding on the deck slab together with the gangplank. , the expansion and contraction function is lower than that of the asphalt mixed surface layer, which could be a factor that inhibits the expansion and contraction of the bridge.

(Object of the Invention) In view of the above, the present invention provides a block layer in which a plurality of blocks are laid through a filling layer on a cover member that covers a gap at a road joint, and pavement is placed on top of this block layer. To provide a road joint that is easy to construct and can absorb the expansion and contraction of a road bridge without causing cracks in the pavement using a filling layer and a block layer.

In a structure in which the pavement is provided on the second side of the block layer, the present invention prevents the paving material from peeling off and popping out when the pavement shifts from the block layer and bulges up or cracks occur. This is what I am trying to do.

(Structure of the present invention) The road joint according to the present invention forms a stepped portion lower than the road surface height at the opposite end of the road with a clearance at the road joint, and covers an i-space between both stepped portions. A lid member is constructed, a filling layer is provided on the lid member, a plurality of blocks are laid on the filling layer to form a block layer, and paving is applied on the block layer. In this block layer, there is a joint 2F that protrudes in one direction that connects the pavement and the blocks.
By providing steps, the pavement is prevented from shifting or peeling, and the area occupied by all the blocks in the block layer is smaller than the filling area of the Kitagi filling layer, allowing individual blocks to move. Expansion and contraction are allowed in the filling layer, block layer and pavement.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Embodiment 1 - In the road join 1-1 shown in FIG. 1, 2゜2 is a road facing each other with a gap 3, and a slab top surface pavement 5 is applied to the top surface of the slab 4. At the end of this road 2.degree. 2, a stepped portion 6.degree. 6 lower than the road surface height is formed.

A lid member 7 covering the play space 3 is installed on the stepped portions 6, 6, and a filling layer 8 covers the lid member 7 to cover both the stepped portions 6, 6.
A plurality of blocks 9, 9... are laid on top of this filling layer 8 to form a block layer 10, and a joint paving layer 1 is placed on top of this block layer 10. is applied.

In the case of one example, the lid member 7 is formed into a plate shape from a rubber material, and the center portion of the lid member 7 is bent in a U-shape in the play space 3,
Both ends of the lid member 7 are connected to anchor poles 1- implanted in the floor slab 4.
12 is fixed to the stepped portion 6 by applying a NAND. The filling N8 is formed of a filling material such as sand or bituminous material, and has a thickness of, for example, 30 mm, to the extent that it covers the upper end of the anchor bolt 12, that is, the block 9 and the anchor bolt 12 do not interfere with each other.
degree).

The block 9 is formed of cement concrete, asphalt concrete, stone, resin material, resin mortar, resin concrete, rubber, or the like.

The block 9 of this example is formed into a rectangular shape as shown in FIG. 3, and the length of one side of the block 9 is approximately 70 m+n. The length of this side can be changed as appropriate within the range of about 50 to 250 rmI. The height of block 9 is the pavement thickness of the upper surface of the slab 50
~80nn), and this height is also 10~2
It can be determined as necessary within a range of about 00nwn.

In the block layer 10, every other block 9 in the road width direction and the longitudinal direction is provided with coupling means 1 that protrudes upward. The connecting means 14 in this example is constituted by a connecting bar whose upper part is bent into a hook shape, and connects the joint paving device 1 and the block 9. This coupling means 14 may be a straight bar-shaped reinforcing bar, a steel bar whose upper part is bent into an L shape (-a steel bar whose upper part is bent into an L-shape), or a bolt with a head. In addition, in this embodiment, the upper surface of each block 9 is made lower than the upper surface of the floor slab, so that the upper end of the coupling means 14 does not protrude above the upper surface of the floor slab.In other words, the joint The partial pavement 1 is formed thicker than the upper surface pavement 5 of the deck slab.

Therefore, the area occupied by all the blocks 9 on the upper surface of the filling layer 8 is set smaller than the filling area of the filling layer 8, so that a slight gap S is created between each block 9 as shown in FIG. is being done.

Specifically, in the case of the above embodiment, the length Ll of the stepped portion 6 in the bridge length direction is set to 500 mm, the clearance 3 is set to 100 m assuming a standard clearance time, and the length Ll of the filling area in the bridge length direction is set to 500 mm. The length L is 1100++u. 15 blocks 9 with a side length of 701III11 are laid between the length L (the direct connection length of all blocks is '050 nm), and the gap Ill S of each block 9 is 3.5 on average.
It is about nn1 (total gap i50 mm).

This gap f:IJS is provided with the same width between each plot 9 in the road width n direction, and therefore, the occupancy rate of the block 9 expressed by the following equation is about 91%.

Occupancy rate = (Occupied area / Filled area) x 100 In other words, when the occupancy rate is about 91% and the length in the bridge length direction L is 1100 mm, the total gap amount is 50 nn, and the allowable expansion and contraction of the road bridge is ±
It is 50mm. Note that L is approximately 2000 ntn at maximum.

The gap S between each block 9 is J:M'! Q playing time (temperature 20
'C) is set in the range of 2 to 5 IIR, and this gap S is filled with a joint material 13 such as sand, pitch, paving material, rubber, etc.

At the joint 1 of the road, the expansion and contraction of the deck slabs 4, 4 is allowed by the dimensional change in the bridge length direction of the sand layer 8 and the blocks 510, and with the movement of each block 9 in this block layer 10, the joint pavement position 1 Tensile or compressive stress occurs.

In this case, the joint paving unit 1 is filled! ! It will be affected by the expansion and contraction of the floor slabs 4, 4 through I8 and the block layer 10, and the filling layer 8 and the block layer 10 will have a buffering effect, so the cracks in the joint an device 1 will be Newborn crawling. Even if cracks occur, they will remain small.

Then, the connecting means 14 connects the joint paving unit 1 to the block 9, and prevents buildup due to displacement of the joint paving unit 1, or from the blocks 9 or popping out onto the road in the event of cracks. Prevention.

Ensure running stability and safety. It is also possible to incline the side surface of the stepped part so as to widen upward as indicated by the chain line a in FIG.

Embodiment 21 This example is shown in FIGS. 4 and 5.

That is, in the joint 15 of this example, the lid member 16 that covers the play space 3 is formed into a plate shape from a highly rigid material such as iron, resin, or concrete, and one end is fixed to the stepped portion 6 with an anchor bolt 12. At the other end is a long hole 17 that is long in the bridge length direction.
An anchor bolt 12 is inserted into this elongated hole 17.
is inserted so that it can move relative to the floor slab 4 through the elongated hole 12. In this example, a long hole is provided, but the lid member may simply have one end fixed to the step and the other end placed on the step.

Further, the block layer 18 on the filling layer 8 is constructed by providing a large number of rectangular parallelepiped blocks 19 in a staggered manner (staggered) in the bridge length direction, as shown in a plan view in FIG. The interval S between each block 19 is set wider toward the play area 3.

Further, the connecting means 20 for connecting the blocks 19 and the joint paving device 1 is a cylindrical body, which is embedded in each block 19 and has an upper portion protruding into the joint paving device 1.

In this example, the paving material of the joint paving device 1 enters the cylinder of the coupling means 20, and the bonding force between the joint paving device 1 and the blocks 19 increases.

Next, other examples of blocks will be explained based on FIGS. 6 to 12. Note that the blocks on each side use the same coupling means 14 as in the first embodiment.

The block 21 shown in FIG. 6 has a regular hexagonal planar shape, and the block 22 shown in FIG. 7 has a rectangular planar shape with engaging waves 23 provided on the circumferential surface.

The block 24 shown in FIG. 8 has a protrusion 25 projecting at an angle of 120 degrees. Block 2 shown in Figure 9
6 is provided with an engaging convex portion 27 and an engaging concave portion 28 that engages with the engaging convex portion 27, and each block 26 is brought into a connected state by this engagement.

In FIG. 10, a block 29 having an inverted convex cross section and a block 30 whose upper and lower parts protrude in opposite directions are shown in a combined state.
In the case of 0, the wheel load is distributed from one block to the other blocks, so the blocks do not collapse due to the weight of the five-wheel cylinder. Further, in the case of this example, the gap S between each block is widened as it moves away from the play space.

Further, the block 31 shown in FIGS. 11 and 12 has a groove 32 formed on the upper surface, and a plurality of blocks 31.
Concave grooves 32, 32... of 31... are arranged in series, and a slipper 33.34 is formed by applying reinforcing bars, elongated rigid flat plates, etc. to the concave grooves 32, 32... The blocks 31 are arranged in series. The slip bars 33, 34 are embedded in a filling material 35 filled in the groove 32. Such a connection method using a slip bar is used for the blocks 9゜19.21, 22, 24, 26, 29.30 mentioned in the previous embodiment.
It can also be applied to

In each of the above embodiments, the coupling means is provided only in a specific block of the block layer, but the coupling means may be provided in all blocks. Further, the size of the gap between each block can be set in consideration of the sliding resistance between the block and the filling layer.

(Effects of the Invention) According to the present invention, the filling layer and the block layer exhibit a buffering effect that reduces the influence of expansion and contraction of the deck slab on the pavement at the joint, so cracks in the pavement at the joint are prevented and it lasts for a long period of time. Good vehicle running performance can be maintained, and since the pavement is continuous, impact, running noise, and low frequency waves are prevented from occurring when the vehicle is running, and the effects of rutting are also eliminated. By increasing the length in the direction,
By increasing the above-mentioned buffering effect, it is possible to allow the expansion and contraction of long-span road bridges that have a large amount of expansion and contraction.In addition, the connecting means prevents the pavement from shifting or peeling, improving vehicle running safety. In addition, the expansion and contraction device is inexpensive and easy to construct and maintain.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention; FIG. 1 is a sectional view taken in the bridge length direction showing a road joint in Embodiment 1, and FIG. 2 is an enlarged sectional view of a part of FIG. 1. , FIG. 3 is a plan view showing the equipment on the same side before paving, and FIG. 4 is a sectional view taken in the bridge length direction showing the road join of Example 2.
Fig. 5 is a plan view showing the joint of Example 2 in a state before paving, Figs. 6 to 9 are plan views showing other examples of the block, and Fig. 10 is a plan view showing other examples of the block. FIG. 1I is a plan view showing a block of the slip bar arrangement system, and FIG. 12 is a cross-sectional view of the same. 1.15...road joint, 2...road, 3...play area, 4...floor slab, 6...
... Stepped portion, 7, 1G... Lid member, 8... Filled layer, 9. 19,2], 22°24.26,29,3
0.31...Block, IO, 1B...Block layer, 11...Joint pavement, 14.20.
...Coupling means. Figure 3

Claims (1)

[Claims] (1) A stepped portion lower than the road surface height is formed at the opposite end of the road with a gap between the road joints, and a lid member covering the gap is constructed on both stepped portions, and a lid member is installed on both the stepped portions to cover the gap. A filling layer made of sand, etc. is provided, and a plurality of blocks are laid on top of this filling layer to form a block layer. Paving is applied on top of this block layer, and this block layer is a layer that separates the pavement and blocks. What is claimed is: 1. A road joint comprising an upwardly protruding coupling means for coupling, and characterized in that the area occupied by all the blocks of the block layer on the upper surface of the filling layer is smaller than the filling area of the filling layer.